48 lines
1.1 KiB
Ruby
48 lines
1.1 KiB
Ruby
module Rubella
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# The Rubella::Storage holds the weighted data.
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# Storages can be added to get a timeline. But the Storage has no concrete
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# knowledge of time.
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# The Storage can have a defined length. If new data is added, it will drop
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# the oldest entries.
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#
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class Storage
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attr_reader :data
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attr_reader :length
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def initialize data, length = nil
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@data = data
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self.length = length
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end
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# Defines the length of the Storage.
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# Be careful, if your Storage has more entries, tha the new length, the
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# oldest entries will immediately be dropped.
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#
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def length= length
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@length = length
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# Drop entries, if more than new length
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if @length.kind_of? Integer
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while @data.length > @length
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@data.pop
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end
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end
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@length
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end
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# Adds the data from the given storage to the own data and return this as a
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# new Storage. Does not modify one of the storages.
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#
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# @param storage Rubella::Storage Storage with new data
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# @return Rubella::Storage
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#
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def add storage
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Storage.new (storage.data+@data), @length
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end
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end
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end
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